My 1st car was a 1984 subaru sedan. That's back in the day when the entire body of the car rusted out within a year but the engine would go for 300,000 miles or more. 4 years later, my second car was a 1983 subaru sedan. This was a Southern USA car and therefore its body was mint.
Howerver, the Maine winterized salty roads took care of that in short order. A couple of years later, I could touch the ground with my foot (and the doors were closed!) Also, the front seat rusted away from the floor boards. Heck, when the seat won't even remain stationary I guess it's time to dump the thing.